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Home >> Mercury >> 2010 >> Milan Base, Standard >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 8 (HVAC - Climate Control System - General Information And Diagnostics (Hybrid)) >> Diagnosis And Testing >> Climate Control System >> Pinpoint Tests >> Pinpoint Test C: DTC B1A69:11 or 15 >> Pinpoint Test C: DTC B1A69:11 Or 15

Pinpoint Test C: DTC B1A69:11 Or 15

WARNING: This page is about a different variant/trim than selected.
  1. C1 CHECK THE SENSOR OUTPUT VOLTAGE 
    • Ignition OFF.
    • Disconnect: In-Vehicle Temperature/Humidity Sensor C2247.
    • Ignition ON.
    • Measure the voltage between in-vehicle temperature/humidity sensor C2247-4, circuit VH413 (WH/BU), harness side and C2247-5, circuit RH111 (GY/BU), harness side.
      Fig 1: Checking Sensor Output Voltage
      G06262697Courtesy of FORD MOTOR CO.
    • Is the voltage between 4.7 and 5.1 volts? 
    • Yes:  INSTALL a new in-vehicle temperature/humidity sensor. CLEAR the DTCs. REPEAT the self-test. If code returns, GO to  C7.
    • No: For DTC B1A69:15  , GO to  C2.

      For DTC B1A69:11  , GO to  C5.

  2. C2 CHECK CIRCUIT VH413 (WH/BU) FOR A SHORT TO VOLTAGE 
    • Ignition OFF.
    • Disconnect: HVAC Module - Dual Automatic Temperature Control (DATC) C2356a.
    • Disconnect: HVAC Module - DATC  C2356b.
    • Ignition ON.
    • Measure the voltage between ground and HVAC module - DATC C2356b-20, circuit VH413 (WH/BU), harness side.
      Fig 2: Measuring Voltage Between Ground & HVAC Module - DATC C2356B-20, Circuit VH413 (WH/BU), Harness Side
      G06262698Courtesy of FORD MOTOR CO.
    • Is any voltage present? 
    • Yes:  REPAIR circuit VH413 (WH/BU) for a short to voltage. CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation.
    • No:  GO to  C3.
  3. C3 CHECK CIRCUIT VH413 (WH/BU) FOR AN OPEN 
    • Ignition OFF.
    • Measure the resistance between HVAC module - DATC  C2356b-20, circuit VH413 (WH/BU), harness side and in-vehicle temperature/humidity sensor C2247-4, circuit VH413 (WH/BU), harness side.
      Fig 3: Checking Circuit VH413 (WH/BU) For Open
      G06262699Courtesy of FORD MOTOR CO.
    • Is the resistance less than 5 ohms? 
    • Yes:  GO to  C4.
    • No:  REPAIR circuit VH413 (WH/BU) for an open. CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation.
  4. C4 CHECK CIRCUIT RH111 (GY/BU) FOR AN OPEN 
    • Measure the resistance between HVAC module C2356a-10, circuit RH111 (GY/BU), harness side and in-vehicle temperature/humidity sensor C2247-5, circuit RH111 (GY/BU), harness side.
      Fig 4: Checking Circuit RH111 (GY/BU) For Open
      G06262700Courtesy of FORD MOTOR CO.
    • Is the resistance less than 5 ohms? 
    • Yes:  GO to  C7.
    • No:  REPAIR circuit RH111 (GY/BU) for an open. CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation.
  5. C5 CHECK CIRCUIT VH413 (WH/BU) FOR A SHORT TO CIRCUIT RH111 (GY/BU) 
    • Ignition OFF.
    • Disconnect: HVAC Module - DATC  C2356b.
    • Measure the resistance between in-vehicle temperature/humidity sensor C2247-4, circuit VH413 (WH/BU), harness side and C2247-5, circuit RH111 (GY/BU), harness side.
      Fig 5: Checking Circuit VH413 (WH/BU) For Short To Circuit RH111 (GY/BU)
      G06262701Courtesy of FORD MOTOR CO.
    • Is the resistance greater than 10,000 ohms? 
    • Yes:  GO to  C6.
    • No:  REPAIR circuit VH413 (WH/BU) for a short to circuit RH111 (GY/BU). CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation.
  6. C6 CHECK CIRCUIT VH413 (WH/BU) FOR A SHORT TO GROUND 
    • Measure the resistance between HVAC module - DATC  C2356b-20, circuit VH413 (WH/BU), harness side and ground.
      Fig 6: Checking Circuit VH413 (WH/BU) For Short To Ground
      G06262702Courtesy of FORD MOTOR CO.
    • Is the resistance greater than 10,000 ohms? 
    • Yes:  GO to  C7.
    • No:  REPAIR circuit VH413 (WH/BU) for a short to ground. CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation.
  7. C7 CHECK THE MODULE CONNECTION 
    • Inspect the module connectors for:
      • corrosion.
      • pushed-out terminals.
      • damaged terminals.
    • Connect and correctly seat all the HVAC module connectors.
    • Clear the DTCs.
    • Operate the system and verify the concern is still present.
    • Is the concern still present? 
    • Yes:  INSTALL a new HVAC module. REFER to REMOVAL AND INSTALLATION . TEST the system for normal operation.
    • No:  The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation.
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